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Photocatalyst comprising titanium fluoride nitride for water decomposition with visible light irradiation

外国特許コード F110005174
整理番号 A121-34US
掲載日 2011年8月25日
出願国 アメリカ合衆国
出願番号 50028302
公報番号 20050020440
公報番号 7015171
出願日 平成14年8月7日(2002.8.7)
公報発行日 平成17年1月27日(2005.1.27)
公報発行日 平成18年3月21日(2006.3.21)
国際出願番号 JP2002008071
国際公開番号 WO2003068393
国際出願日 平成14年8月7日(2002.8.7)
国際公開日 平成15年8月21日(2003.8.21)
優先権データ
  • 特願2002-036587 (2002.2.14) JP
  • 2002WO-JP08071 (2002.8.7) WO
発明の名称 (英語) Photocatalyst comprising titanium fluoride nitride for water decomposition with visible light irradiation
発明の概要(英語) (US7015171)
A photo-catalyst containing titanium fluoride nitride comprising, Ti(IV)OaNbFc or a compound represented by MeTi(IV)OaNbFc prepared by doping at least one metal Me selected from the group consisting of alkali or alkaline earth metals on Ti(IV)OaNbFc. (wherein, b is 0.1 to 1, c is 0.1 to 1 and a is a value to maintain Ti(IV) and is decided in relation to b and c.).
The photo-catalyst containing titanium fluoride nitride is especially characterized by loading at least one promoter selected from the group consisting of Pt, Ni and Pd.
特許請求の範囲(英語) [claim1]
1. A photo-catalyst containing a titanium (IV) compound comprising, Ti(IV)OaNbFc or a compound represented by MeTi(IV)OaNbFc prepared by doping at least one metal Me selected from the group consisting of alkali or alkaline earth metals on Ti(IV)OaNbFc, wherein, b is 0.1 to 1, c is 0.1 to 1 and a is a value to maintain Ti(IV) and is decided in relation to b and c.
[claim2]
2. The photo-catalyst of claim 1 further comprising at least one promoter selected from the group consisting of Pt, Ni and Pd.
[claim3]
3. The photo-catalyst of claim 1, wherein Ti(IV)OaNbFc possesses anatase structure and MeTi(IV)OaNbFc possesses perovskite to anatase structure.
[claim4]
4. The photo-catalyst of claim 3 further comprising at least one promoter selected from the group consisting of Pt, Ni and Pd.
[claim5]
5. A photo-catalyst for water splitting containing a titanium (IV) compound comprising, Ti(IV)OaNbFc or a compound represented by MeTi(IV)OaNbFc prepared by doping at least one metal Me selected from the group consisting of alkali or alkaline earth metals on Ti(IV)OaNbFc, wherein, b is 0.1 to 1, c is 0.1 to 1 and a is a value to maintain Ti(IV) and is decided in relation with b and c.
[claim6]
6. The photo-catalyst for water splitting of claim 5 further comprising at least one promoter selected from the group consisting of Pt, Ni, Ru and Pd.
[claim7]
7. The photo-catalyst for water splitting of claim 5, wherein Ti(IV)OaNbFc possesses anatase structure and MeTi(IV)OaNbFc possesses perovskite to anatase structure.
[claim8]
8. The photo-catalyst for water splitting of claim 7 further comprising at least one promoter selected from the group consisting of Pt, Ni and Pd.
[claim9]
9. A method for preparation of a photo-catalyst represented by Ti(IV)OaNbFc, wherein b is 0.1 to 1, c is 0.1 to 1 and a is a value to maintain Ti(IV) and is decided in relation to b and c, comprising baking titanium di-ammonium fluoride halide represented by (NH4)2TiFdX6-d, wherein, d is 1–
6, and which contains at least F and ammonium halide by the ratio of equimolar or by the ratio of slightly excess of ammonium halides at the maximum temperature from 200 deg. C. to 500 deg. C. whereby a starting material is formed, followed by nitrogenating said starting material by thermal synthesis in ammonia atmosphere containing from 0.02% to 10.00% of oxygen, air or water to ammonia by reduced mass to oxygen atom at the maximum temperature from 350 deg. C. to 700 deg. C. for over than 5 hours.
[claim10]
10. A method for preparation of a photo-catalyst represented by SrTi(IV)OaNbFc, wherein, bis 0.1 to 1, cis 0.1 to 1 and a is a value to maintain Ti(IV) and is decided in relation to b and c, comprising baking titanium di-ammonium fluoride halide represented by TiFxX6-X and/or (NH4)2TiFdX6-d, wherein x and d are 1–6, and which contains at least F, and at least one compound selected from the group consisting of SrO, SrOH and SrX so as to form a starting material or SrTiF6, followed by nitrogenating said starting material or SrTiF6 by thermal synthesis in ammonia atmosphere containing from 0.02% to 10.00% of oxygen, air or water to ammonia by reduced mass to oxygen atom at the maximum temperature from 350 deg. C. to 700 deg. C. for over than 5 hours.
  • 発明者/出願人(英語)
  • DOMEN KAZUNARI
  • HARA MICHIKAZU
  • TAKATA TSUYOSHI
  • NUKIMIZU KOTA
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 502/200
  • 502/226
  • 502/227
  • 502/230
  • 502/350
参考情報 (研究プロジェクト等) CREST Creation and Functions of New Molecules and Molecular Assemblies AREA
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